Andy Hollis' One Lap Miata (K24 Honda power)
#188
Took the car for its first competition outing...Optima Ultimate Street Car Challenge at NCM Motorsports Park. Managed 4 th in the autocross and 6th in the track competition in the fastest class. Learned a bunch about the setup.
Big items to solve ASAP:
1) Do something about underhood temps. Need to install the double-ceramic-coated headers and vent the hood.
2) Need better cold-air intake setup. This one was delivering IAT's of 146, killing lots of power.
3) Clutch is slipping after about 4 hard laps on the 4-5 shift only (other shifts are fine). Granny shifting will save it sorta...but it's a problem. Not sure if heat -related (downppe is right next to clutch housing) or simply insufficient pressure plate clamping,
4) Once the car is really hot, the throttle likes to hang partially open...about 4K rpm idle worth.
Big items to solve ASAP:
1) Do something about underhood temps. Need to install the double-ceramic-coated headers and vent the hood.
2) Need better cold-air intake setup. This one was delivering IAT's of 146, killing lots of power.
3) Clutch is slipping after about 4 hard laps on the 4-5 shift only (other shifts are fine). Granny shifting will save it sorta...but it's a problem. Not sure if heat -related (downppe is right next to clutch housing) or simply insufficient pressure plate clamping,
4) Once the car is really hot, the throttle likes to hang partially open...about 4K rpm idle worth.
#193
The autocross and speed stop both have stage lines about five feet from the start line, which hands the AWD cars about a half a second advantage right off the bat. Hard to make that up. But the one Evo is super well-driven and engineered (same one which podiumed at One Lap this year).
I also got dicked on the engineering review and still have no clue as to why. Almost DFL on that segment.
Event Results
Last edited by AndyHollis; 06-08-2015 at 10:34 PM.
#195
I was under the impression that it is the only one that really works.
#196
Looking good as always Andy. I'm curious what you come up with for the intake. You know, so I can steal your idea....
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Home of the original KMiata Swap
K24 NC swap is coming in 2024! Learn more
info@kpower.industries
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#199
I think Andy's diagnosis is spot-on. He's dumping tons of heat into the engine compartment with those big, snaking, uninsulated headers.
Andy, another thing to consider is that simple circular holes cut into sheet metal don't flow well because of the sharp edges. If you riveted some of these in, the radius should help the air get through:
ALUMINUM FLANGES FOR DUCTING from Aircraft Spruce
Last edited by hornetball; 06-09-2015 at 10:59 AM.